Install plugin & resourcepack
First you'll need a resource pack for the plugin. You can simply add the resourcepack in the server.properties or download it and pack it in your client.

1. Download the plugin from github releases. And maybe the resource pack, when you skip step 4.

2. Put the plugin inside your plugins folder.

3. Navigate to the root directory of your server and open server.properties.

4. In server.properties go to resource-pack` and add
https\:// www.dropbox.com/scl/fi/jo68cvycy6g44r22wuxsy/soul-resources-1.3.zip?rlkey=v20krm9nb73yfxb2e1jm2cd1g&dl=1 to it.

5. Save and close, start... you're done! But make sure you have resource packs on your client enabled when join the server.